SEFRAM MW 3390 Notice D'utilisation page 26

 P : Meter is saving the peak maxi-
MAX
mum and minimum value.
Peak maximum value is displayed.
 P : Meter is saving the peak maxi-
MIN
mum and minimum value.
Peak minimum value is displayed.
 CAL : Press and hold PEAK button≧3
sec to calibrate the Meter itself for
accurate measurement.
 Normal : Press and hold PEAK button
to return to normal operation.
Back Light
Back light Automatic off after 60 seconds.
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